Question

if the area of circle is 154cm^2 then its perimeter is​

Answer 1

Answer:

To find perimeter of any circle firstly we require the radius of the circle so that we can apply the formula of perimeter of the circle. ln this question radius is indirectly given and can be calculated as:-

As area of circle is given so,

$\pi {r }^{2} = 154 {cm}^{2} \\ \implies {r}^{2} = \frac{154}{ \pi} \\ \implies \: r = \sqrt{ \frac{154}{ \pi} }$

So now perimeter of circle using the formula to find perimeter will be :-

$2 \times \pi \: \times r \\ = 2 \times \frac{22}{7} \times \sqrt{ \frac{154 \times 7}{22} } \\ = 2 \times \frac{22}{7} \times \sqrt{7 \times 7} \\ = 2 \times \frac{22}{7} \times 7 \\ = 44cm\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\: \boxed{\boxed{ANSWER}}$

Answer 2

Answer:

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